CSS3 Conditional Rules (@supports) Last Call

The CSS Working Group has published a Last Call Working Draft of CSS3 Conditional Rules. This module defines the existing @media rule for media-specific parts of style sheets, which use media queries as a condition syntax, and introduces the new @supports rule for parts of style sheets that are specific to implementations that support particular property:value pairs. It also defines associated APIs.

This is a Last Call Working Draft; the working group hopes to advance this module to Candidate Recommendation soon after the last call period ends on January 10. If there’s anything you believe
needs to be changed anywhere in the specification, you should say so now. Changes since the last Working Draft are listed in the Changes section.

As always, please send feedback to the (archived) public mailing list www-style@w3.org with the spec code (>>[css3-conditional]<<) and your comment topic in the subject line. (Alternatively, you can email the editor and ask him to forward your comment.)